What is the Function of a Torque Converter?

[ElijahDella]

The functions of a torque converter: 1. Transmit torque: The engine's torque is transmitted through the driving element of the torque converter, then via ATF to the driven element of the torque converter, and finally to the transmission. 2. Continuously variable transmission: The torque converter can achieve stepless changes in speed and torque within a certain range. 3. Automatic clutch: Since the torque converter uses ATF to transmit power, the engine will not stall when the brake pedal is pressed, which is equivalent to the clutch disengaging. The torque converter is a type of hydraulic transmission component, consisting of a pump impeller, turbine, and guide wheel. The pump impeller is connected to the driving shaft and converts the mechanical energy input from the driving shaft into the kinetic energy and pressure head of the fluid through centrifugal force for the turbine to perform work. The turbine is connected to the driven shaft and outputs the energy contained in the fluid's kinetic energy and pressure head through the driven shaft.

[Andy]

I've been driving for years and I particularly enjoy studying various components in a car. The torque converter is the heart of an automatic transmission, functioning like a hydraulic cushion. When you press the accelerator to start, especially on steep slopes, it amplifies the engine's torque, giving the car more power and preventing stalling unlike manual transmissions. When idling, the engine keeps running while the car remains stationary, all thanks to its vibration isolation that protects the transmission. If it fails, you'll experience strong jerking sensations, or even the car not moving after shifting gears. I remember once when my car lacked power during acceleration, changing the transmission fluid fixed it because dirty oil affects hydraulic performance. Although highly efficient, it requires regular maintenance to prevent increased fuel consumption or sluggish acceleration. In short, it makes driving smoother and more comfortable, eliminating the hassle of manual clutch operation.

[CodyLynn]

When I first drove an automatic car, I was curious about how it could start so smoothly and powerfully. A friend explained that it's all thanks to the torque converter. It uses hydraulic fluid to transfer power, increasing torque during starts, making uphill climbs or towing effortless. When the car idles, it buffers the connection, preventing engine vibrations from damaging the vehicle. During normal driving, power transitions smoothly, unlike manual transmissions where pressing the clutch can be tiring. The downside is slightly lower efficiency at times, consuming a bit more fuel, but modern designs have improved significantly. Once it ages, you might notice sluggish acceleration or increased vibrations. I recommend beginners learn more about this; simple maintenance like fluid changes can extend its lifespan. The enhanced driving experience of automatic transmissions really owes a lot to it.

[StDante]

The torque converter in an automatic transmission is a clever device that connects the engine and gears, providing strong acceleration when starting off. At low speeds, it uses hydraulic fluid to amplify torque, making it easier to climb hills or overtake. It also allows the engine to idle without moving the vehicle, reducing vibration and wear. During normal driving, it ensures smooth power transmission. If it fails, it can cause jerky gear shifts or power loss. Regular transmission fluid changes are sufficient for maintenance.